John c



(No Model.)

- J. G. SGHAEPER.

SAFETY VALVE FOR BEER GASKS.

Patented Mar. 22, 1887. JCi

nl .NUL l i K inn, M

WE1/VES SES h fvTTOR-NEYS NV PETERS. Pnerulmgmphan wzmxngem DAQ lhvirnn S'rn'rns Parent* @erica JOHN C. SOHAEFER, OF NEYV YORK, N. Y., ASSIGNOR TO `THE SCHAEFER SAFETY VALVE COMPANY, OF SAME PLACE.

SAFETY-VALVE FOR BEE'R-CASKS.

SPECIFICATION forming part of Letters Patent No. 359,892, dated March 22, 1887.

(No model.)

To @ZZ whom it may concern.:

Be it known that I, JOHN C. Sonsnrnn, a citizen of the United States, residing at New York, in the county and State of N ew York, have invented new and useful Improvements in Safety-Valves for Beer-Casks, 85e., of which the following is a specification.

My invention relates to improvements iu safety-valves for beer-casks; and it consists,es sentially, in the combination, with a valveshell, a lubricating cup or vessel, and a valve seat therein,ot' a weighted valve-disk on said seat, a passage or passages 4leading from the valve-shell to the seat and opening below the valvedisk, and a passage leading from below the valve-disk to the lubricating-cu p, the said valvedisk being constructed to permanently close the orifices of the passages in the valvescat from the lubricant above the said seat; and also in combination with the above-nientioned parts is a chamber containing a diaphragm, which prevents the lubricant from entering the cask, all of which is more fully pointed out in the Vfollowing specification and claims, and illustrated Ain the accompanying drawings, in which- Figure l represents a longitudinal vertical section of the safety-valve. verse section thereof in the plane a', Fig. l. Fig. 3 is a sectional plan or top view with the val ve-disk and adjacent parts removed. Fig. 1l is an inverted plan view of a detail part.

Similar letters indicate corresponding parts.

In the drawings, the letterA designates the valve-shell.

B is a cup or vessel containing the lubricant, such as water or oil, which communicates with the interior of the valve'shell through a passage, b.

C is a chamber that is in communication with the valve-shell, the latter being secured Fig. 2 is a transthreaded bush of the Cask when the valve is applied. The chamber contains a longitudinal diaphragm, F, which emanates from below the branch O and extends upwardly in the chamber up above the level of the upper edge of the cup or vessel B. The lubricant troni the cup or vessel completely fills the valveshell and rises in the reservoir f, formed between the diaphragm F and the wall of the chamber to the level in the cup or vessel.

In the bottom of the cup or vessel is formed a seat, g, for a valve-disk, G, which latter consists of a circular flat piece of soft rubber or similar elastic material, which is held down to the seat at and near its periphery by an annular disk or bushing, H, which is screwed upon the same. The bushing is provided with a concave or recessed portion, which allows the central portion of the valve-disk to rise from its seat when under pressure. A washer, It, can be inserted between the valve-disk and the bushing Il. The valve-disk is held down on its seat by means of a piston, I, which ex" tends through the bushing Il, and the stem 1l 0i' which is engaged by an arm, J, which Carries an adjustable weight, J', Fig. l. A cover, M, Fig. l, provided with one or more holes or openings, m, and a long tubular shank, closes over the valve, the holes or openings in the cover allowing the lubricant to freely enter the casing thus formed and come in contact with the upper surface ol' the valve-disk G therein.

Passages or channels a c lead i'rom thevalveshell A and open in the valt-e-seat, through which passages the accumulating gases pass and act against the Valvedisk. When in eX- cess of pressure, the gases distend the valvedisk and make their exit underneath the same through an exit passage or channel, B', which leads downward from the valve-seat and opens into the cup or vessel B.

The valve-disk G, whether distcnded or on its seat, prevents the egress of the gases through its casing, and also prevents at all times the lubricant from entering the valve above the valveseat.

It will be noticed that the lubricating liquid in the cup or vessel can moist-en only the upper surface oi' the valve-disk throughV the holes IOC in the valvecover M, and in order to insure a constant Contact of the liquid with the bottom or `lower surface of the disk I provide a gate, N, Fig. 1, for the opening b, leading to the` valve-shell, which gate must close this open* ing while the valve is in use, but can be opened before the filling of the casi; has begun. This gate consists of a shell, which screws into the bottom of the cup or vessel, and is provided with a series of transverse holesn, which open the communication between cup and shell when they rise above the level of the bottom. A suitable seat is provided for the gate, and a stein, n', projecting from the shell, allows it to be easily turned.

In applying the valve to use, the cup or vessel is supplied with water, preferably, which iows through the passage b into the valveshell and chamber, and also fills the valvecasingywhereby the liability of the valve to gumi or foul is entirely obviated. Ihe` liquid is prevented from flowing into the cash by the diaphragm F.

The object of my invention is to produce a safety-valve for casks which is durable, efficient, and simple, and which can be inanufae tured cheaply. With the construction of valve specified the weight J can be made very heavy, so as to prevent a constant escape or" the generating-gases,whi eh is liable to occur with or diuary valves when the existing pressure of gases is below that fixed by the weight.

What I claim as new, and desire to secure by Letters Patent, is-u 1. 'Ihe combination, with the valve shell, a lubricating cup or vessel, and a valveseat therein, of passages leading from the valveshell and the cup or vesselto the valve-seat` and having orifices therein and a valve-disk over said seat constructed to permanently close the said orifices in the same from the ing from the valve-shell to the `valveseat and f opening below the valve-disk, and a passage, B', leading from below the valve-disk to the lubricating cup `or vessel, substantially as shown and described.

3. The combination, with the valve-shell and the lubricating cup` or vessel havingaY valve-seat, of the weightedvalve-diskG,the i perforated cover M over said valve-disk, a

passage, a., leading from the valve-shell tothe valve seat and opening below the valve-disk,4

a passage, B', leading fronrbelow' the valvef disk to the lubricating cup or vessel, a chamber, C, in communication with the valve-shelh and a diaphragm, F, in said chambenextended upward from the valve-shell above the level of the lubricating cupor vessel, substantially as shown and described.

et. Tliecoinbinatioii,with thevalve-shell, the i lubricating cup or vessel, `and the chamber and its diaphragm, of Va valvedisk, a passage leading from the valve-shell to the lubricating the gate N, constructed to admit the lubricant in the cup or vessel to the valve-shell and Chaniber, substantially as shown and described.

In testimonywhereof I have hereunto set my hand and seal in the presence of two sub-` scribing witnesses.'

JOHN C. SCHAEFER. [In

Witnesses:

XV. Hamer, I

F. KASTENHUBEP..

Y 7o' cup or vessel and controlled by said valve, and 

